Car-brake.



Patented Jan. 23, I900. P. SCHRIEFFER.

C A R B R A K E.

(Application filed Aug, 26, 1899.)

3 Sheets Sheet (No Model.)

W/TNESSES NVENTOH ME uonms PEILRS co. mpramnmmsumaron. a. c

Patented Jan. 23, 1900. v P. SCHRIEFFER.

C A R B RA K E.

(Application filed Aug. 26, 1899.!

3 Sheets-Sheet 2.

(No Model.)

A TTOHNE YS Patented Jan. 23, I900. P. SCHRIEFFER.

C A R B R A K E.

(Application filed Aug. 26, 1899.)

3 Sheets-Sheet 3.

(No Model.)

W/ TN E SSE S A TTOHNEYS UitiTnn STATES PATENT OFFICE.

PETER SOIIRIEFFER, OF NEW ORLEANS, LOUISIANA.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent N 0. 642,008, dated January23, 1900.

Application filed August 26, 1899. Serial No. 728,591. (No model.)

To all whom it may concern:

Be it known that 1, PETER SCHRIEFFER, of New Orleans, in the parish ofOrleans and State of Louisiana, have invented a new and ImprovedCar-Brake, of which the following is a full, clear, and exactdescription.

This invention relates to improvements in car-brakes, particularlybrakes for electrically-operated cars; and one object is to provide abrake of simple construction that can be quickly and tightly set bycomparatively little exertion of manual power; and a further object isto operate the electric controller by the means for operating the brake.

I will describe a car-brake embodying my invention and then point outthe novel features in the appended claims.

Reference is to be had to the accompanying drawings, forminga part ofthis specification, in which similar characters of reference inclicatecorresponding parts in all the figures.

Figure 1 is a side view of a car, showing a brake mechanism embodying myinvention and illustrating the brake as released. Fig. 2 is a sideelevation showing the brake as set. Fig. 3 is a bottom plan view. Fig.4is asection through a brake block and eccentric. Fig. 5 is a sectionthrough the line 5 5 of Fig. 2. Fig. 6 is a section through the line 6 6of Fig. 2. Fig. 7 is an elevation showing a brakelever and itsconnection with an electric controller. Fig. 8 is a plan view thereof,and Fig. 9 is a section through the line 9 9 of Fig. 7.

Each brake comprises a block 1, to which is removably attached abrake-shoe 2. The brake-shoe is here shown as provided with lugs 3,adapted to engage in recesses formed in the block 1 and through whichfasteningpins at are passed. Extended from the brakeblock at theopposite side from that to which the shoe is secured is a weighted arm5, adapted to move the brake-shoe out of engagement with the wheel whensaid shoe is released, as will be hereinafter described.

The brake-blocks for one set of opposite wheels are mounted loosely oneccentrics 6, which are secured to a rock-shaft 7, having bearings inboxes 8, supported on the side bars of the truck-frame. The two blocksof the other opposite wheels are mounted on similar eccentrics securedto a shaft 9, having bearings in blocks 10, secured to the side bars ofthe truck-frame. Each eccentric has at one side an annular flange 11 forengaging against one side of the brake-block, and a ring-like plate 12is removably secured to the eccentric and engages against the other sideof the brake-block. On this plate 12 is a lug 13, adapted to be engagedwith a lug 14 on the brake-block for a purpose as will be hereinafterdescribed.

From an arm 15, extended downward from the shaft 9, a draw-rod 16extends to a connection with an arm 1'7, extended upward from the shaft7, and from an arm 18, extended downward from the shaft 7, a draw-rod 19extends to a connection with an arm 20, extended upward from the shaft9. The upper ends of the rods 16 and 19 are forked, so that the oppositemembers engage with opposite sides of the upwardly-extended arms, andthrough these portions both pins are passed.

A draw-rod 21 has its inner end pivotally connected to an arm 22,extended upward from the shaft 9 in line with the arm 17 on the shaft'7. This draw-rod 21 has a slot 22, through which the pivot for theupper end of the rod 16 passes. The draw-rod 23 has its inner endpivotally connected to an arm 24.,

extended upward from the shaft 7 in line with the arm 20 on the shaft 9,and this rod 23 has a slot through which a pivot-pin or the upper end ofthe rod 19 passes. The draw-rod 21 has connection with anoperating-lever at one end of the car and the draw-rod 23 has connectionwith an operating-lever at the other end, and as these connections andlevers are of similar construction it is deemed necessary to show butone in the drawings. The outer end of the draw-rod is pivotallyconnected to an arc-shaped lever 25, mounted to swing on a block 26,secured to the under side of the car-bottom, and from the otherend ofthis lever 25 a link 27 extends to a connection with the operating-lever28, here shown as pivotally connected to the base portion of asegment-rack 29, attached to the upper side of the car-platform. Thelower portion of this lever 28 of course passes through a suitableopening in the platform.

A stop-rod 30 is mounted on the lever 28 and is designed to engage withthe segmentrack for holding the lever as adjusted. This rod slides onthe lever 28, and it is moved upward by means of a hand-lever 31, havingpivotal connection with said rod and with the lever, and is moveddownward by a spring 32, attached to the lever 30 and engaging at itsfree end with the lever 31.

The operation of the device as so far described is as follows: When itis desired to set the brake, the lever 28 is to be moved, as hereindicated, in the direction of the controller-box 33 on thecar-platform. This movement of the, lever will rock the shaft 7, andthis rocking of the shaft 7 by means of its connection 19 with the shaft9 will also rock said shaft 9. Thisrocking of the levers will turn theeccentrics to cause the brake-shoes to engage more or less tightlyagainst the wheels, the pressure of course being governed by thedistance the lever is thrown. When it is desired to release the brake,the lever 28 is to be thrown to its normal position, which will ofcourse return the eccentrics to their normal position, and then theweighted arms on the brake-blocks will swing said brake-blocks on theeccentrics until the lugs 14 engage with the lugs 13, which will preventfurther movement of the brake-blocks, leaving the brakeshoes, however,free from the wheel.

While I have shown a brake mechanism for each pair of wheels, it isobvious that the brake mechanism for one pair of wheels only need beused, if so desired, and they may be placed either at the forward orrear side of the wheels.

I will now describe the means operated by the lever 28 for operating thecurrent-controller arranged within the controller-box 33.

Secured to the dashboard of the car is a guide 34. Movable in the'guide34 is a rackbar 35, having a rack 36 at one end adapted for engagementwith a pinion 37, attached to the controller-shaft 38. On thiscontrollershaft 38 is a pin 39, adapted to engage with a pin 40 on thetop of the box 33 to limit the movement of the controller-shaft onturning on the current. From one end of the rackbar 35 the block 41extends outward through the open front of the guide 34, and an arm 42extends from this block and over the inner side of the lever 28. A pin43 passes through this portion 42 and through a slot formed verticallyin the lever and then intothe bar 35. A pointer 44, attached to theblock 41, extends over the tops of the guides 34, and when the lever 28-is in its extreme right-hand position the rack 36 will be in engagementwith the point intermediate of the marks 45 and the controller-box, asindicated in the drawings, and at this time the current will be fullyshut off and the rack 36 out of engagement with the pinion 37. Thisposition shows the limit of movement of the brake-lever. when thebrake-shoes are in good condition. Should the lever move, however,farther than this point or to the point indicated at 46, it willindicate that the old shoes should be replaced by new ones.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent 1. In a brake, a rock-shaft, an eccentricmounted on the rock-shaft, a brake-block loosely mounted on theeccentric, a shoe on the block and a weight on the side of the blockopposite that of the shoe and operating to move the shoe out ofengagement with a wheel, substantially as specified.

2. In a car-brake, a rock-shaft supported on the car-truck, eccentricssecured to said shaft, brake-blocks loosely mounted on the eccentrics,weighted arms extended from the blocks, brake-shoes attached to theblocks, a draw-rod having connection with an arm extended from therock-shaft, and a lever having connection with the draw-rod,substantially as specified.

3. In a brake, rock-shafts arranged adjacent to front and rear wheels,eccentrics mounted on said shafts, a rod extended from adownwardly-extended arm of each shaft to.

an upwardly-extended arm of the other shaft, draw-rods extending fromboth the extended arms on each of the shafts,.the said draw-rods beingextended in opposite directions, levers having connection with saiddraw-rods,brake-' blocks loosely mounted on the eccentrics, and weightedarms extended from the'block, substantially as specified.

4. In a brake, a rock-shaft, an eccentric mounted on the rock-shaft, abrake-block loosely mounted on the eccentric, a weighted arm extendedfrom the said block, a shoe on the block, and means for operating theshaft,

substantially as specified.

5. In a brake, a rock-shaft, an eccentric secured to the rock-shaft, abrake-block loosely mounted on the eccentric, a lug on the brake-blockadapted for engagement with the" lug on the eccentric, a weighted armextending from the block, and means for rocking the rock-shaft,substantially as specified.

6. In a brake, a brake-block, a brakeshoe having lugs for removablyengaging recesses formed in the block, fastening-pins extend ing throughsaid block and through the lugs, and a weight attached to the inner sideof the block, substantially as specified.

7. In a brake, a rock-shaft, a brake-block mounted eccentrically on therock shaft, weighted arms extended from the blocks, a draw-rod extendedfrom an arm on the rockshaft, a curved lever with one end of which saiddraw-rod engages, an operating-lever 9. In an electric car, a brake, alaterallyswinging lever for operating the brake, a rackbar, a pin onsaid rack-bar extended through a slot in the lever, a controller-shaft,and a pinion on said shaft adapted for engagement with the rack,substantially as specified.

PETER SGHRIEFFER.

Witnesses:

J AMES JONES, G. PITARD, Jr.

